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borna godaz

manufacturer of cathodic protection anodes

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High Silicon Cast Iron Anode - HSCI

Friday, 08 March 2019 00:00
  • High silicon cast iron anodes

High silicon Cast iron anodes are the most common anodes used for a variety of cathodic protection applications including deep well anode systems, shallow anode installations, offshore applications as well as many other types of cathodic protection systems.. So, high quantity of silicon and chromium elements in these anodes increase corrosion resistance siginificatly. So this matter can guarantee life time of buried facilities in kind of soils with different resistivities for a long time.

High silicon cast iron anode with tublar shape surrounded with coke breeze in stainless steel canisters.jpg

High silicon cast iron anode with tublar shape surrounded with coke breeze in stainless steel canisters

 

The commercial name of this alloy is tantiron which is produced according to ASTM-A 518 and IPS-M-TP-750 standards. These anodes are divided into two groups of "C" and "N" in terms of chemical composition. C-Type tantiron is commonly used in acidic or alkaline soils or sea water. Also, N-type tantrion is used in environments including neutral soil or fresh water (hot water tanks, etc.). So The chemical composition of these anodes correponds with ASTM A518 G3 and BS 1519 14.4 which follows from following table:

element (wt%) Chemical composition
Type NType C
C0.9-10.9-1
Si14.25-14.7514.25-14.75
MnMax 1.5Max 1.5
MoMax 0.2Max 0.2
CuMax 0.5Max 0.5
Cr04.3-5
FeRemainedRemained


The physical properties of these anodes are as follows which is According to the IPS-M-TP-750 standard:

Physical properties

quantity

density

g/cm3 7-7.05

hardness

HB Min 500

Compressive

strenght

MPa Min 650

Special resistivity

Max microohm.cm 72

Impact resistance

J Min 0.1

 

 

 


 shrinkable cape.jpg

The consumption rate of High Silicon Chrome Cast Iron anodes has been found to be between 0.2 and 1.2 pounds per ampere-year. For anodes of the same chemistry and microstructure, variance in consumption is primarily due to the chemical and physical characteristics of the anode environment. The consumption rate does not appear to be significantly affected by current density (amperes per unit area of anode surface). The use of coke breeze around the anode in soil ground beds will tend to lower the consumption rate. A generally accepted design guideline for anodes buried in coke breeze is 0.1 Kg/per amp-year. The maximum output current density and consumption rate of high silicon cast iron anodes in different environmental conditions are as follows:

Environmental

Condition

Maxiumum of output current density

(A/m2)

Consumption rate

(Kg/A.Year)

Carbon backfill150.1
Fresh water100.12
Sea water150.3


The connection of copper cable to anode according to following figure is a Lead Caulking type, which provides a solid connection with the lowest voltage drop at the connection point. So The connection of cable to anode is covered by an epoxy resin and a heat-shrink cap is placed on it in order to prevent of entering moisture.

 

connection of cable to anode.png

 

 

Typically, these anodes are produced in two sizes of 2 × 60 and 3 × 60 inches. It should be noted that output current of anode with 2 × 60 inches dimension in carbon backfill environment (coke breeze) is about 2 ampers. Also the output current of these anodes is about 3 amps for 25 years life time. Dimensional specifications and weight of these anodes are as follows According to IPS-M-TP-750 standard:

Dia of anode

(mm)

Head Dia of anode

(mm)

lenght

(mm)

weight

(kg)

517691514.5
5176122019
5176152522.5
7610291529
76102122038
76102152549

 

The following documents show typical datasheets of HSCI (High Silicon Cast Iron) anode made in BORNA Godaz company.  Also, Other informations such as ITP, QCP and chemical and Physical reports according to IPS M-TP-750/1 & ASTM A518M-86/3 Standards have shown here. 

 

Technical Documents of BornaGodaz High Silicon Cast Iron Anode:

Datasheet Sample of High Silicon Cast Iron Anode-Rod type According to IPS-M-TP-750

Datasheet Sample of High Silicon Cast Iron Anode-Tantiron C 2.60 (22.5 kg Net Weight)

Datasheet Sample of High Silicon Cast Iron Anode-Tantiron C 3.60 (49 kg Net Weight)

HSCI Anode Report of 5-regional gas transmission operation (Chemical Composition) Approved by RAZI Metallurgical Research Center

HSCI Anode Report of 5-regional gas transmission operation (Electrical Conductivity test) Approved by RAZI Metallurgical Research Center

HSCI Anode Report of 5-regional gas transmission operation (Charpy Impact Test) Approved by RAZI Metallurgical Research Center

HSCI Anode Report of 5-regional gas transmission operation (Vickers Hardness Test) Approved by RAZI Metallurgical Research Center

Chemical Analysis & Physical Properties of High Silicon Chromium Cast Iron Anode - Approved by Corrosion Laboratory of Tarbiat Modares University

Radiography Test Report of High Silicon Cast Iron Anode

BornaGodaz HSCI Anode ITP

BornaGodaz HSCI Anode QCP

Contact us

02156233930-02156233929
02156232587-02156236590
02156230236
 [email protected]
Tehran Province, Shamsabad Industrial City, Golbarg Number 2

   

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BORNA Godaz Company was established on the path of development of BORNA Electronic activities in the field of cathodic protection in 2004. ...

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